Hello,
I was studying for 2 hours a day during 35 days and got 640 (41Q, 37V), unfortunately I totally blew IR (2), but thanks God, it is not a part of the total score calculation.
I can recommend 2 excellent resources for your preparation:
1. prep4gmat (free, available on Appstore) - more than 1000 questions with explanations. Excellent for an i-Pad.
2. 800score com (USD40 - 1 year subscription). 5 full exams simulations with pace control and explanations.
My opinion about other resources that I used:
- GMAT Pill - good, but I prefer to read explanations rather than to listen.
- Economist - good but wordy. In addition, they advise to 'scan' multiple paragraphs passages in Verbal rather than to read them. This cannot lead you anywhere. You MUST thoroughly read ALL paragraphs and make short notes.
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GMAT club tests - was not impressive, sorry.